efi_root_node.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Root node for system services
*
* Copyright (c) 2018 Heinrich Schuchardt
*/
#include <common.h>
#include <malloc.h>
#include <efi_loader.h>
const efi_guid_t efi_u_boot_guid = U_BOOT_GUID;
efi_handle_t efi_root = NULL;
struct efi_root_dp {
struct efi_device_path_vendor vendor;
struct efi_device_path end;
} __packed;
/**
* efi_root_node_register() - create root node
*
* Create the root node on which we install all protocols that are
* not related to a loaded image or a driver.
*
* Return: status code
*/
efi_status_t efi_root_node_register(void)
{
efi_status_t ret;
struct efi_root_dp *dp;
/* Create device path protocol */
dp = calloc(1, sizeof(*dp));
if (!dp)
return EFI_OUT_OF_RESOURCES;
/* Fill vendor node */
dp->vendor.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
dp->vendor.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
dp->vendor.dp.length = sizeof(struct efi_device_path_vendor);
dp->vendor.guid = efi_u_boot_guid;
/* Fill end node */
dp->end.type = DEVICE_PATH_TYPE_END;
dp->end.sub_type = DEVICE_PATH_SUB_TYPE_END;
dp->end.length = sizeof(struct efi_device_path);
/* Create root node and install protocols */
ret = EFI_CALL(efi_install_multiple_protocol_interfaces
(&efi_root,
/* Device path protocol */
&efi_guid_device_path, dp,
#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT)
/* Device path to text protocol */
&efi_guid_device_path_to_text_protocol,
(void *)&efi_device_path_to_text,
#endif
/* Device path utilities protocol */
&efi_guid_device_path_utilities_protocol,
(void *)&efi_device_path_utilities,
#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2)
#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL)
/* Deprecated Unicode collation protocol */
&efi_guid_unicode_collation_protocol,
(void *)&efi_unicode_collation_protocol,
#endif
/* Current Unicode collation protocol */
&efi_guid_unicode_collation_protocol2,
(void *)&efi_unicode_collation_protocol2,
#endif
#if CONFIG_IS_ENABLED(EFI_LOADER_HII)
/* HII string protocol */
&efi_guid_hii_string_protocol,
(void *)&efi_hii_string,
/* HII database protocol */
&efi_guid_hii_database_protocol,
(void *)&efi_hii_database,
/* HII configuration routing protocol */
&efi_guid_hii_config_routing_protocol,
(void *)&efi_hii_config_routing,
#endif
#if CONFIG_IS_ENABLED(EFI_RNG_PROTOCOL)
&efi_guid_rng_protocol,
(void *)&efi_rng_protocol,
#endif
NULL));
efi_root->type = EFI_OBJECT_TYPE_U_BOOT_FIRMWARE;
return ret;
}